Chair shell



FIG. 1 is a front perspective view of a chair shell showing my new design;

FIG. 2 is a front elevational view;

FIG. 3 is a rear elevational view;

FIG. 4 is a left side elevational view;

FIG. 5 is a right side elevational view;

FIG. 6 is a top plan view;

FIG. 7 is a bottom plan view; and,

FIG. 8 is a front perspective view thereof.

The broken line showing of arms and a base in FIG. 1 is for environmental purposes only and forms no part of the claimed design. 

The ornamental design for a chair shell, as shown and described. 